PIC16F630/676
9.1
Configuration Bits
Note:
Address 2007h is beyond the user program
memory space. It belongs to the special con-
figuration memory space (2000h - 3FFFh),
which can be accessed only during program-
ming. See PIC16F630/676 Programming
Specification for more information.
The configuration bits can be programmed (read as '0'),
or left unprogrammed (read as '1') to select various
device configurations, as shown in Register 9-1. These
bits are mapped in program memory location 2007h.
REGISTER 9-1:
CONFIG — CONFIGURATION WORD (ADDRESS: 2007h)
R/P-1 R/P-1 U-0
U-0
—
U-0
—
R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1 R/P-1
BG1 BG0
bit 13
—
CPD
CP BODEN MCLRE PWRTE WDTE F0SC2 F0SC1 F0SC0
bit 0
bit 13-12 BG1:BG0: Bandgap Calibration bits for BOD and POR voltage(1)
00= Lowest bandgap voltage
11= Highest bandgap voltage
bit 11-9
bit 8
Unimplemented: Read as ‘0’
CPD: Data Code Protection bit(2)
1= Data memory code protection is disabled
0= Data memory code protection is enabled
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2-0
CP: Code Protection bit(3)
1= Program Memory code protection is disabled
0= Program Memory code protection is enabled
BODEN: Brown-out Detect Enable bit(4)
1= BOD enabled
0= BOD disabled
MCLRE: RA3/MCLR pin function select(5)
1= RA3/MCLR pin function is MCLR
0= RA3/MCLR pin function is digital I/O, MCLR internally tied to VDD
PWRTE: Power-up Timer Enable bit
1= PWRT disabled
0= PWRT enabled
WDTE: Watchdog Timer Enable bit
1= WDT enabled
0= WDT disabled
FOSC2:FOSC0: Oscillator Selection bits
111= RC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN
110= RC oscillator: I/O function on RA4/OSC2/CLKOUT pin, RC on RA5/OSC1/CLKIN
101= INTOSC oscillator: CLKOUT function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN
100= INTOSC oscillator: I/O function on RA4/OSC2/CLKOUT pin, I/O function on RA5/OSC1/CLKIN
011= EC: I/O function on RA4/OSC2/CLKOUT pin, CLKIN on RA5/OSC1/CLKIN
010= HS oscillator: High speed crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN
001= XT oscillator: Crystal/resonator on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN
000= LP oscillator: Low power crystal on RA4/OSC2/CLKOUT and RA5/OSC1/CLKIN
Note 1: The Bandgap Calibration bits are factory programmed and must be read and saved prior to erasing
the device as specified in the PIC16F630/676 Programming Specification. These bits are reflected
in an export of the configuration word. Microchip Development Tools maintain all calibration bits to
factory settings.
2: The entire data EEPROM will be erased when the code protection is turned off.
3: The entire program memory will be erased, including OSCCAL value, when the code protection is
turned off.
4: Enabling Brown-out Detect does not automatically enable Power-up Timer.
5: When MCLR is asserted in INTOSC or RC mode, the internal clock oscillator is disabled.
Legend:
P = Programmed using ICSP
R = Readable bit
-n = Value at POR
W = Writable bit
1 = bit is set
U = Unimplemented bit, read as ‘0’
0 = bit is cleared x = bit is unknown
DS40039E-page 54
© 2007 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
